Your best bet is to bring the bank into the conversation and make sure they're okay with what you're working on with the owner.

What is the bet way to hire public adjustor?

So as a 'safer' bet, we decided that using FHA loans with a 30 year-fixed would be our best option since we intend to buy and hold.

I bet many might not..

If they are floating, the may go up each year which will impact your cash flow.Your best bet is to secure a loan with a term length that is longer than your projected hold period.

Trouble is, I’d bet that the seller has already tried and some or all don’t want to sell.  

Once you are out of the bad deal, you can take the cash you do get out of it, and invest in a property that will make money...meaning, you will recover the temporary losses you have now, and start making a profit again.Staying with a bad hand, and continuously "betting on it", will get you out of the game fast. 

Argus would be your best bet for software but can be expensive if you don't already have access. 

@Omar Khan, great lifestyle but betting harder to do RE business. 

I would look into selling a partial at a premium if you have your heart stuck on selling at a premium.Selling a 5-year partial at a premium is a much safer bet in case the loan refinances.